Thomastik-Infeld Spirocore bass strings feature a core that has greater elasticity than that of conventional strings, which means less inertia and a greater propensity for musical vibration.

The sound is full and homogenous, balanced and voluminous. The string has been calibrated to satisfy the express wish of many artists for a string that is equally effective for arco and pizzicato playing styles.

Bassists with a low C extension will value this string's reliability. Spirocore is also favored by jazz bassists for amplified pickup tone.

Spirocore's hi-tech core makes for effortless fingering, responsive bowing, stable tuning, and a very long string life. With Spirocore the steel string's technical possibilities have been developed to their maximum.